Mysterious spokes found in crater on Mercury - space - 30 April 2009 - New Scientist
Onesimpleprinciple can explain also that mystery. All atoms nucleus exploding all a time and emit/radiate exploding energywaves who have a nature of exploding electrons and exploding particle who also radiate/emit exploding energy.
So, Sun exploding and emit/radiate exploding energywaves who have nature of exploding particle who emit/radiate exploding kineticenergy for exploding planets like mercury.
Some times sun radiate very strong energypulse who giving some change of pressure for mercury skin etc...
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